Alternating-current-translating device.



PATENTED JUNE 12, 1906.

L. H. THULLBN. ALTERNATING CURRENT TRANSLATING DEVICE.

APPLICATION FILED OOT.13.1903.

3 SHEETS-SHEET 14 .OKW

10% ZiWZm PATENTED JUNE 12, 1906.

v L..H. THULLBN.

, ALTBRNATING CURRENT TRANSLATING DEVICE.

APPLICATION FILED 0GT13. 1903.

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PATENTED JUNE 12 L. H. THULLEN. ALTERNATING OURR VICE.

BNT TRANSLATING DE APPLICATION FILED 0011s, 1903.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

LOUIS II. THULLEN, OF EDGEWOOI), PENNSYLVANIA, ASSlGNOlt TO THE UNIONSWl'lOll AND SIGNAL COMPANY, OF SWlSSVALE, PENNSYL- VANIA, A CORPORATIONOF PENNSYLVANIA.

Specification of Letters Patent.

ratenteo. June 12. 1906.

Application filed October 13. 1903. Serial No. 176,836.

To all whom it may concern.-

Be it known that I, LoUIs H. THULLEN, a citizen of the United States,and a resident of Edgewood, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inAlternating- Current-Translatin Devices, of which the following is aspecii ication.

My invention relates to alternating-currenttranslating devices.

In the drawings I have illustrated my invention in the form of a relay,but it will be understood that it may be applied to any device which isdesigned to translate alternating-current energy into some other form ofenergyfor example, mechanical motion.

I will describe an alternating-current-translating device in the form ofa relay embodying my invention and then point out the novel featuresthereof in claims.

In the accompanying drawings, Figure 1 is a side elevation of analternating-current relay embodying my invention. F1g. 2 is a horizontalsectional view of the relay shown in Fig. 1, the section being taken onthe line 2 2 and looking in the direction of the arrow. Fig. 3 is'a viewpartly in elevation and partly invertical section, the section beingtaken on the line 3 3 of Fig. 2. Fig. 4 is a similar view taken on theline 4 4 of Fig. 2. Fig. 5 is a detail sectional view. Figs. 6, 7, and 8are each detail views of parts'comprised in the relay of Figs. 1 to 5.

Similar letters of reference designate corresponding parts in all of thefigures.

The mechanism or parts comprised in the relay are inclosed in a suitablecasing consisting of a top plate a, a bottom plate a, and a wall a. Thewallet is preferably of some transparent materi alfor example, glass.The several parts of the caslng are secured together by means of bolts 0The relay comprises a core, an energlzlng coil or coils, and a movablepart, in effect an armature, which moves in one direction in response tothe effects of an alternating current in the coil or coils and moves ina reversedirection in response to gravity or mechanical means when noalternating current is passlng through the coil or coils. The reversemovements of the movable members are utilized to make and break contactsincluded in elec tric circuits and by such make and breaks to open andclose'theoircuits of said contacts.

the two coils are preferably in series. The

ends of the core are rovided with lateral extensions b (See igs. 6 and8.) The purose of these extensionsb b is to provide a arge area at thepoles of the core and reduce the reluctance produced b the air-gapbetween the ends of the core to the magnetic circuit of the core.

C designates the movable member or armature of the relay, which is madefrom some non-magnetic materialsuch, for example, as aluminium. It isshown as being segmental in shape and as being carried by arms 0,radiating from a shaft 0. It extends between the ends of the core B, andit is moved, and with it the shaft 0, in one direction by the efiects ofan alternating current flowing through the coils B B rents flowingthrough the coils B B generate lines of force in the core B, whichcutting the metal bands I) set up in each of the bands an inducedcurrent,'which induced currents, however, are of a different phase -orare out of step with the current flowing through the coils B B Theinduced currents in the bands 1), generate lines of force in those(parts .ofthe core which they embrace, an these lines of force. generateedd y a bracket or brackets- Alternating curcurrents 'on the movablemember 0. T e

lines of force generated in the core B by the coils B B which aredisplaced with reference to the lines of force generated by the inducedcurrents in the band, also generate eddy-currents on the movable memberC. These eddy-currents will be of such polarity and direction relativeto the currents in the core B as to cause the member 0 to rotate withits shaft. The principle involved herein is substantially the same asthe rinciple involved in most alternating singI e-phase motors and insome alternating-currentmeasuring instruments. In order that the maximumeffect of the eddy-currents on the movable member be obtained, slots 0are provided in the movable member in order that the path of theeddy-currents be lengthened in parallel paths on the member C ratherthan in circular paths, which would be the case Without the slots. Byhaving these eddy-currents paralleled on the member C they will cut thelines of force produced in the core B b the coils B B and bands I) atsuch ang e as to produce the maximum tor ue on the member C. The shaft 0is pre erably a crank-shaft and is journaled at its, end on pointedscrews 0 c, which are adjustable in hangers c 0, depending from the top(1 As shown, it is provided w th :two crank portions 0 a, the purpose ofwhlch s to allow the points of contact of the circuit or circuits whichthe relay is to control to be located close to the center of rotation ofthe shaft 0'. The purpose of having the points of contact close to thecenter of rotation of the shaft 0 is that more pressure is obtained inmaking the contact than'would be obtained were the cont-acts fartheraway from the center, for the relative distance between the'contacts andthe center of rotation and.

the member C and the center of rotation is about the maximum.

The contact-points controlled by the rotation of the member C eachcomprises a carbon or other point 0", which is carried by a binding-postc and a suitable spring contact-plate c, which plate is suitably fixedon acrank c or c of the shaft. Each contactspring is electricallyconnected to one end of a coiled spring 0. coiled spring is electricallyconnected witha binding-post c. The spring contact-plate c is suitablyheld between insulating-rings c, and the coiled spring 0 is carried by aring or collar of insulation 0". c designates binding-posts for theterminals of the coils So long as alternating current flows through thecoils B B the contacts made by the pairs of carbon-points and springcontactplates will be closed, as the member (I will be held elevated(see Fig. 5) by the effect of the alternating current in the mannerhereinbefore set forth. When current is cut off from. the coils, themember 0 Wlll rotate down- Ward against a stop 0", and thus break thecontacts.

11 designates an adjustable counterweight,

The other end of the which is provided on the shaft 0, the purpose 'ofwhich is to counterbalance principally the movable member C. Byadjusting the counterbalance the relay may be made more or lesssensitive of electrical energy traversing the coils.

My invention is applicable in all or a part translating devices,especiall where a part is rotated or partially rotated by reason of ashifting magnetic field produced by alternating currents of differentphases.

What I. claim as my invention is 1. In a translating device, thecombination of electromagnetic means, a movable member provided withradial slots for lengthproduce on said movab emember by the elecandbroken by the movement of said movable member.

2. In an alternating-current relay, the combination of a movable memberoperated in one direction by electromagnetic means when affected by analternating current, and contacts made and broken by the movement coiledsprings. I

3. In an alternating-current relay, the

ated in one direction by electromagnetic means when affected by analternating cur rent, a crank-shaft upon which said'member is supported,and contact-pointslocated near the center of rotation or said shaft.

4. In an alternating-current relay, the combination with a movablemember operated in one direction by eletromagnetic means when affectedby an alternatingcurrent, a crank-shaft upon which said member ismounted, contact-points located near the carried by said shaft.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

1 LOUIS ll. TllULLEN W'itnesses:

SADE BERARD,

GEO. E. Cause of its features to other alternating-current-' ening oraralleling the ath of eddycurrents tromagnetic means, and contact-pointsmade.

of said member, said contacts comprising center of rotation of saidshaft-and spring-' plates comprised 1n sald contact-points andcombination with a movable member oper-

